1,720,991 research outputs found
Ulrich Beck: modernità e cosmopolitismo fra Occidente e non-Occidente
No full textQuesto contributo offre alcune considerazioni su due dei temi centrali della riflessione di Ulrich Beck: la (ri)formulazione dell'idea di modernità nei termini di "seconda modernità"; e la conseguente esigenza di formulazione di un adeguato corredo metodologico e concettuale di impronta cosmopolita per l'analisi di questa nuova condizione della storia dell'umanità.
L'idea di una "seconda modernità", proiettata al di là dei caratteri industriali e delle categorie interpretative della modernità classica, nell'offrire un'alternativa alla tesi dell'avvento di una condizione postmoderna, ne coopta e neutralizza la critica, facendo uso dell'incertezza epistemologica prodotta dalla crisi dei fondamenti scientifici moderni per sancire teoricamente e legittimare un'incertezza sociale a sua volta deterministicamente ricondotta all'avvento di una società – anche globale – del rischio.
La proposta di un cosmopolitismo metodologico come necessario per l'analisi della seconda modernità elude la questione relativa all'inadeguatezza di categorie analitiche metodologicamente nazionaliste per lo studio della prima modernità; e, al tempo stesso, marginalizza o silenzia, eurocentricamente, tanto il ruolo costitutivo del mondo non occidentale nella genealogia intellettuale e istituzionale della modernità, quanto il "lato oscuro" di quest'ultima così come definita dall'Occidente
Voci: Archivio, EAD (Encoded Archival Description), Metadato, Open Access, Public History, Web semantico,
No full textDevelopment and distribution of FMRFamide-like immunoreactivity in the toad (Bufo bufo) brain
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Coexistence of FMRFamide and gonadotropin-releasing hormone immureactivities in the anterior preoptic area and median eminence of frog brain
No full textDevelopment and distribution of FMRFamide-like immunoreactivity in the toad (Bufo bufo) brain
No full textImmunohistochemical localization of multiple forms of gonadotropin- releasing hormone in the brain of the adult frog
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Development and distribution of FMRFamide-like immunoreactivity in the toad (Bufo bufo) brain
No full textBy using immunohistochemistry, we studied the development and distribution of the FMRFamide-like immunoreactive (ir) neuronal system in the toad brain during the ontogeny. In addition to this, experimental evidence was provided to show that the rostral forebrain-located FMRFamide neurons originate in the olfactory placode and then migrate into the brain along the olfactory pathway. During early development, within the brain, FMRFamide-ir perikarya first appeared in the periventricular hypothalamus. Later in development, FMRFamide-ir cells were visualized in the rostralmost forebrain simultaneously with similar ir cells in the developing olfactory mucosa. Selective ablation of the olfactory placode(s), prior to the appearance of the first FMRFamide-ir cells in the brain, resulted in the total absence of ir cells in the telencephalon (medial septum and mediobasal telencephalon) of the operated sides(s). The preoptic-suprachiasmatic-infundibular hypothalamus-located FMRFamide-ir neurons were not affected by olfactory placodectomy, arguing that they do not originate in the placode. This result points to the placode as the sole source of such neurons in the rostral forebrain. (C) 2001 Elsevier Science B.V. All rights reserved
Distribution of FMRFamide-like immunoreactivity in the brain and pituitary of Rana esculenta during development
No full textDevelopmental aspects of the distribution of FMRFamide (Phe-Met-Arg-Phe-NH2) immunoreactivity (ir) were investigated by indirect immunofluorescence in the brain, pituitary and terminal nerve of the frog, Rana esculenta. Soon after hatching, FMRFamide neurons were found in the proximal terminal nerve, mediobasal olfactory bulb, caudal dorsolateral pallium, diagonal band of Broca, anterior preoptic area, suprachiasmatic area, thalamus,infundibulum, and developing pituitary. FMRFamide fibers were present in the olfactory epithelium, terminal nerve, olfactory bulbs, dorsal and midventral telencephalon, epiphysis, mediolateral thalamus, pretectal gray, optic tectum, infundibulum, posterior interpeduncular nucleus-tegmentum area, and rostral rhombencephalon. During successive developmental stages, ir neurons were no longer observed in the dorsal telencephalon and pituitary. In late larval stages, ir neurons appeared in the medial septal area, and ir fibers in the cerebellum and torus semicircularis. At the same time, the frequency of ir neurons increased progressively in the anterior preoptic area, suprachiasmatic area and infundibulum. FMRFamide-ir neurons were never revealed in mesencephalon and rhombencephalon. Numerous ir fibers terminated in the median eminence and intermediate lobe of the pituitary. The adult-pattern of distribution of FMRFamide-ir elements in the brain was achieved during the postmetamorphic development. In light of the existing literature, the possible placodal origin of forebrain-located FMRFamide neurons is briefly discussed
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